Arcade Fire frontman Win Butler is a known basketball aficionado, having played in the NBA All-Star Celebrity Game for the past three years. Now, Butler has taken to Twitter to ask fans to donate towards the medical costs of his late friend Mouhamadou “Mouss” Moustapha, who was a basketball teammate of his in New Orleans. Calling him “a really lovely person,” Butler says that he’ll match donations up to $5,000 on anything donated in the next week. Mouss passed away earlier...